Summary of the story: "I've had enough. . . . " . 163 CN2 4809 4837 and CMI in the overseas booth announcement, which is essentially the operator's backbone network AS number or abbreviation. They reflect the telecommunications, connectivity, mobile exit routes that Chinese mainland users may go through when visiting an overseas machine room.
What is it: the line code corresponds to which backbone
Key Conclusions: 163, CN2, 4809, 4837, CMI are not separate marketing terms, but AS codes or abbreviations for each operator's backbone network. Understanding these code numbers allows the reader to make their own judgments about a route without relying on commercial advertising and can also understand why the same overseas machine room, telecommunication, connectivity and mobile user experience may be different.
| Code name | Assigned / AS numbered | Explained |
|---|---|---|
| 163 and | Chinese telecommunications ChinaNet, AS 4134 | Telecommunications legacy backbone network, large capacity, many users; late peak international segment easy to clog; low cost, is the mainstream line of low-cost VPS |
| Manufacture from materials of any heading, except that of the product | Chinese telecommunications, AS 4809 | The second generation of the telecommunications backbone network, divided into two tiers GT and GIA; what is CN2 GIA versus CN2 GT? |
| 4837 and | China-connected backbone network, AS 4837 | Common Ethernet backbone; also AS 9929, Network A/CNCNET, better quality and common on high-end connectivity lines |
| CMI | China Mobile International (CMI) is one of the world's largest mobile operators. | Mobile international exports; mobile broadband, cell phone users visiting overseas booths mostly here, expanding rapidly in recent years |
This type of code frequently appears in overseas machine shop announcements, because the quality of access from overseas machines to mainland China depends not only on the bandwidth, CPU or memory of the machine room but also on the operator's backbone network and international export and return routes. For readers, what is really important: When a businessman promotes CN2 threads for BGP threads, he needs to go back to which carrier, which AS, and how the actual round trip goes about these issues.
How to choose: Match lines by visitor network
The same machine, the three operators experience different key is that overseas room to mainland China usually need cross-operator connectivity: electrical credit user go telecommunications export, connected users go interconnected exports, mobile users go mobile exports. If you take only one of the high quality lines in the room, the other two access quality may be discounted.
| Visitors make up | Priority areas | Choosing a Thought |
|---|---|---|
| Mostly e-credit users | Return to the CN2 GIA | If budget is limited, consider GT or premium 163 |
| Mainly connected users | AS 9929 or Quality 4837 | High-end connectivity lines are more commonly referred to as AS 9929; the standard connection backbone is AS 4837 |
| Mainly mobile users | CMI directly related to mass | Most mobile broadband and cell phone users have access to overseas booths through CMI International Exports |
| Visitors are complicated | Three network BGP direct connectivity room | Don't just look at the propaganda, but experiment with telecommunications, connectivity and mobile networks. |
If the site mainly serves foreign trade business, corporate official website, development test environment or domestic visitor-oriented compliance business, line selection should be judged by actual user network structure and not only keywords such as CN2 buttons or BGP keys.
Note: Do not use the code as a guarantee.
The IP segment of the backbone network in a routing path can be observed when querying line attribution:
| Routing IP segment | Commonly attributed |
|---|---|
| 202.97.x.x and | Telecommunications |
| (See also footnote.) | Telecommunications and CN2 |
| 219.158.x.x, and | Connected 4837 |
| 223.120 x.x / 223.118.x.x | Moving the CMI |
How to find out: . . . , . . and . . .. . . ? .
- Windows can use tracert.
- Linux / macOS can use traceroute or mtr.
- You can also use graphical tools such as BestTrace, the IP library query site to view your carrier and geographic location by IP.
- The results suggest cross-validation with multiple tools, and that a single tool or IP segment should not be used as the final basis.
Please note: All delay and routing information is subject to change with scaling and scheduling, based on current testing prior to purchase. The line quality and route information are official and the specific line quality depends on the actual status of each operator and each engine room.
FAQs
Q1: Does CN2 represent all three carriers?
Not necessarily. CN2 mainly addresses China's telecommunications backbone network, connectivity and the experience of mobile users still depends on engine room interconnection, return routing and operator export quality.
Q2: Is three-network direct and BGP multiline the same thing?
Objectives are related but not exactly the same. The three networks directly emphasize that telecommunications, connectivity and mobile users go through their respective backbones; BGP multiline is a way to achieve multi-carrier access, the actual quality still needs to be tested.
Q3: Can an IP address determine the ownership of a line?
It can be used as a clue, for example 202.97.x.x common correspondent telecommunications 163,59.43.x. x common corresponding telecommunication CN2,219.158.x.X common correspondence interconnect 4837,223.120.x .x / 223.118.x mobile CMI. Recommended to combine with `tracert゙ , ∀tracer゙oute , ≠mtr゙ , BestTrace or the IP library query tool cross-validate。
Q4: What is the difference between AS 4837 and AS 9929?
AS 4837 is the common interconnect backbone; AS 9929 for Interconnect A/CNCNET, often used in higher quality high-end connectivity lines.
Q5: What are the scenarios for this information?
Line selection references suitable for overseas VPS, standalone servers under compliance scenarios such as site access, development testing and foreign trade operations.
Links within the site
- What is CN2 GIA vs.
- How to choose an overseas VPS room: routes, rooms and billing
- Difference between BGP multiline and ternary
- Connecting AS 9929 to AS 4837 line alignment
- Frequently asked questions about CMI Mobile International
Updated with image alt
As of 2026-10, the exact date has not been disclosed.
Information verification is the official standard for:2026-10; line quality and routing information.
Image alt: flat vector style illustration of machine room, chip, SIM card and map elements without text or brand logo.
Reader comments (0)